add manual trigger for R-CMD-check GHA

Author: mbstadler

.github/workflows/R-CMD-check.yaml

@@ -1,4 +1,5 @@
 on:
+  workflow_dispatch:  # Enables manual triggering
   push:
   pull_request:
     branches:
@@ -52,7 +53,7 @@ jobs:
       #  run: |
       #    remotes::install_version("Matrix.utils", version = "0.9.8", repos = "http://cran.us.r-project.org")
       #  shell: Rscript {0}
-        
+
       - name: Query dependencies
         run: |
           saveRDS(remotes::dev_package_deps(dependencies = TRUE, repos = c(getOption('repos'), BiocManager::repositories())), 'depends.Rds', version = 2)
@@ -110,11 +111,11 @@ jobs:
       - name: Upload install log if the build/install/check step fails
         if: always() && (steps.build-install-check.outcome == 'failure')
         uses: actions/upload-artifact@v3
-        with: 
+        with:
           name: install-log
           path: |
             ${{ steps.build-install-check.outputs.install-log }}
-            
+
       - name: Test coverage
         if: matrix.config.os == 'ubuntu-latest'
         run: |